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70 lines
2.5 KiB
70 lines
2.5 KiB
package com.example.demo.circulator.service;
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import com.example.demo.Dao.paymentMapper;
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import com.example.demo.Dao.productMapper;
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import com.example.demo.Dao.usageDateMapper;
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import com.example.demo.bean.Product;
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import com.example.demo.bean.Repayment;
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import com.example.demo.bean.UsageDate;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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@Service
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public class EPR_CirService extends CirService{
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@Autowired
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private usageDateMapper usageDateMapper;
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@Autowired
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private paymentMapper paymentMapper;
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@Autowired
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private productMapper productMapper;
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@Transactional //数据库与事物的一致性
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public double NextCirculator(long checkNum){
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try{
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UsageDate usageDate = usageDateMapper.selectUsageDateByCheckNum(checkNum);
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Repayment repayment = paymentMapper.selectPepaymentBycheckNum(checkNum);
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if(usageDate!=null){return -2;}
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int year = usageDate.getYear();
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double amount = usageDate.getAmount();
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long productNum = usageDate.getProductNum();
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Product product = productMapper.selectProductByProductNum(productNum);
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if(product==null)return -3;
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float intrate = product.getIntrate();
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double rep_amount = 0;
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if(repayment!=null)
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repayment.getRepAmount();
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intrate /= 12;
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int month = year*12;
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double next_principal_and_interest = amount/month + (amount - rep_amount) * intrate;
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return next_principal_and_interest;
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}catch(Exception e){
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e.printStackTrace();
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}finally {
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}
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return -1;
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}
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public double SumCirculator(long productNum,double amount,int year){
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try{
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Product product = productMapper.selectProductByProductNum(productNum);
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if(product==null)return -3;
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float intrate = product.getIntrate();
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intrate /= 12;
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int month = year * 12;
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double first_principal_and_interest = amount/month + amount*intrate;
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double last_principal_and_interest = amount/month + amount*(1-(month-1)/month)*intrate;
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double principal_and_interest = (first_principal_and_interest + last_principal_and_interest)*month/2;
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return principal_and_interest;
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}catch(Exception e){
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e.printStackTrace();
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}finally {
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}
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return -1;
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}
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}
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